problem with sourcesdk's dll

i just downloaded Studiocompliler and extract in my sourcesdk/bin.

and when i activate StudioCompiler, i got the problem.

The procedure entry point Q_vsnprintf could not be located in the dynamic link library vstdlib.dll.

i try to fix this problem, so i fixed
how? i just downloaded other vstdlib.dll

and again i have a problem.

 Can't Load D:\Program files\Steam\SteamApps\MYACCOUNT\sourcesdk\bin\filesystem_steam.dll

but i have filesystem_steam.dll in my sourcesdk/bin

what’s going on over here?

please anyone help me!